Exploiting network biology to improve drug discovery

Area of Science:

• Cellular Biology
• Drug Discovery
• Biochemistry

Background:

• Mammalian signal transduction relies on dynamic multiprotein complexes.
• Current drug discovery methods often overlook the complex cellular environment.
• There is a need for screening strategies that assess drug effects within their native cellular context.

Purpose of the Study:

• To present a novel strategy for screening drugs and targets in living human cells.
• To enable measurement of spatial and temporal changes in protein complexes.
• To facilitate high-throughput screening and profiling of drug leads.

Main Methods:

• Utilized high-content protein-fragment complementation assays (PCAs).
• Employed synthetic fragments of mutant fluorescent proteins (Venus and/or enhanced yellow fluorescent protein) for PCA construction.
• Assayed spatial and temporal changes in protein complexes in response to drug treatments in living human cells.

Main Results:

• Demonstrated the utility of the PCA strategy for high-throughput screening of known drug targets.
• Showcased the application of this method for screening previously undruggable targets.
• Validated the approach for profiling drug leads to enhance selectivity and safety.

Conclusions:

• The developed protein-fragment complementation assay strategy offers a powerful tool for drug discovery in living cells.
• This method allows for the assessment of drug efficacy and safety by monitoring protein complex dynamics.
• The approach is applicable to both known and novel, previously undruggable targets, advancing pharmaceutical research.